What tyre pressure?

Car has 225x40x18 wheels on it, not the original size - so what pressures should I now put in?

Can I recommend Tyrepal tyre monitors to your readers?

You asked for reader experiences of Tyre Pal. I bought a set just before Christmas 2011 when on offer at a near half price. The sensors are fitted to my S-Type Jaguar. When cold (4 degrees Centigrade)...

Tyre pressures

I owned a Ford Fusion a few years ago. The Owners Handbook had the usual section on the tyre pressures for the car, normal and heavy load. To my surprise there was also included a “Comfort Ride” tyre pressure...

Is nitrogen used in car tyres to prevent rust on the inside of steel wheels?

Nitrogen, the main constituent of air, has the same basic physical properties as air and responds in exactly the same way as air when the temperature and pressure vary (over the ranges that would be found...

Please warn your readers about the Siemens tyre pressure monitoring valves as fitted to my Citroen C5.

I feel bound to add weight to the letter from RH of Cumbria about the catastrophic failure of certain tyre pressure monitoring systems. In February 2010 three Siemens TPMS valves failed within 24 hours...

What are the benefits of nitrogen-filled tyres?

My local ATS is offering to inflate my tyres with nitrogen as an alternative to air. What are the benefits of doing this, as the cost is not very much?

Did my Mercedes-Benz dealer alter my tyre pressures to improve fuel economy?

I purchased a new Mercedes-Benz E220CDI in December 2009. In January I received a call from the dealership asking me to take the car in for a warranty job to be carried out. I took the car in and waited...

Should I drop the tyre pressures in my Honda Civic's winter tyres in cold weather?

I have had winter tyres fitted to my Honda Civic (four years old) and I would like to know if it is a good idea to reduce the pressure during snowy weather? If so what would you recommend? Normal pressures...

Can you advise what the correct tyre pressures are for my BMW 530i when carrying a heavy load?

I am about to head off to the south of France with the family in our BMW 530i Sport Touring (2003) and have seen the tyre pressure on the door saying 2.8 bar front and 3.3 bar rear - assuming heavy load,...

What tyre pressures should I use in my Audi A4's Sunew tyres?

I have recently bought an Audi A4 2.0-litre petrol saloon on a 2004 plate. It has come with different wheels and tyres to standard, hence this request for help. Tyres fitted are Sunew 235 Z40 R18 95W....